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OpenStudy (anonymous):
One dimension of a rectangular map is 8 inches and the perimeter is 40 inches. What is the other dimension of the map? A. 14 inches B. 12 inches C. 4 inches D. 2 inches
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OpenStudy (btaylor):
For a rectangle, the perimeter can be found with the formula P = 2W + 2L. If we let W=8 (arbitrarily, but it doesn't even matter), then we can solve for L.
OpenStudy (anonymous):
so would the answer be D?
OpenStudy (btaylor):
40 = 2(8) + 2L Solve for L.
OpenStudy (nirmalnema):
L=12 inches
OpenStudy (nirmalnema):
2(8+L)=40 8+L=20 L=20-8=12
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